printing problem after change of sapgui from 7.20 to 7.30

Hello

We have printing problem in Serbia after change of sapgui from 7.20 to 7.30. Indeed there are a lot of hashes ###

We are using frontend printing (acccess method F: Printing on Front End Computer) nad device type:Ms Windows driver: SAPWIN5 ISO5.

Prior to going there from Slovakia I aoud like to discuss with all of you gurus where to look for solution

Thank ou in advance

Jan